That’s a Harvard University study’s estimate of the per-gallon price of the president’s global-warming agenda. And Obama made clear this week that this agenda is a part of his plan for addressing the Gulf mess.

So what does global-warming legislation have to do with the oil spill?

Good question, because such measures wouldn’t do a thing to clean up the oil or fix the problems that led to the leak.

The answer can be found in Obama Chief of Staff Rahm Emanuel’s now-famous words, “You never want a serious crisis to go to waste — and what I mean by that is it’s an opportunity to do things that you think you could not do before.”

That sure was true of global-warming policy, and especially the cap-and-trade bill. Many observers thought the measure, introduced last year in the House by Reps. Henry Waxman (D-Calif.) and Edward Markey (D-Mass.), was dead: The American people didn’t seem to think that the so-called global-warming crisis justified a price-hiking, job-killing, economy-crushing redesign of our energy supply amid a fragile recovery. Passing another major piece of legislation, one every bit as unpopular as ObamaCare, appeared unlikely in an election year.